check box clear select boxes

[yakuza]

hi,

i want to know how to clear select boxes if i unselect a check box.

sample of form code

<input type="checkbox" name="truk" value="5">

<select name="day">
<option value=""></option>
<option value="1">1</option>
<option value="2">2</option>
</select>

<select name="month">
<option value=""></option>
<option value="1">1</option>
<option value="2">2</option>
</select>

<select name="year">
<option value=""></option>
<option value="2006">2006</option>
<option value="2007">2007</option>
</select>
best regards

[Randy Webb]

yakuza said the following on 6/11/2006 1:39 PM:

hi,

i want to know how to clear select boxes if i unselect a check box.

You set the selectedIndex of the select to 0.

--
Randy
comp.lang.javascript FAQ - http://jibbering.com/faq & newsgroup weekly
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

[Elegie]

yakuza wrote:

Hi,

i want to know how to clear select boxes if i unselect a check box. <input type="checkbox" name="truk" value="5">

Here, add the following attribute (the "this" keyword referring to the
checkbox object) :

onclick="foo(this)"

.... and then define your function.

<script type="text/javascript">
function foo(cbx){
var sel = ["day", "month", "year"], el=cbx.form.elements;
if(cbx.checked)
for(var ii=0; ii<sel.length; ii++)
el[sel[ii]].options[0].selected=true;
}
</script>
If you are to work with HTML forms, then I suggest you spend some time
and read the following article, which should give you a good insight
into manipulating forms.

<URL:http://www.jibbering.com/faq/faq_notes/form_access.html#faHead>

HTH

[yakuza]

thanks, guys